Pith Number

pith:I2ZBD32K

pith:1997:I2ZBD32K462C4XU6WAC6KJZF3B

not attested not anchored not stored refs pending

Probing the extremes of Seyfert activity: BeppoSAX observations of Narrow-Line Seyfert 1 galaxies

A. Comastri, F. Fiore, G. Matt, G.M. Stirpe, K.M. Leighly, M. Guainazzi, W.N. Brandt

arxiv:astro-ph/9712278 v1 · 1997-12-19 · astro-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{I2ZBD32K462C4XU6WAC6KJZF3B}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T01:40:14.605067Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

46b211ef4ae7b42e5e9eb005e52725d87dddc27f8b5efd6240320de1067e7fc4

Aliases

arxiv: astro-ph/9712278 · arxiv_version: astro-ph/9712278v1 · doi: 10.48550/arxiv.astro-ph/9712278 · pith_short_12: I2ZBD32K462C · pith_short_16: I2ZBD32K462C4XU6 · pith_short_8: I2ZBD32K

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/I2ZBD32K462C4XU6WAC6KJZF3B \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 46b211ef4ae7b42e5e9eb005e52725d87dddc27f8b5efd6240320de1067e7fc4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3b089f5fa89701baf006f8aa216711d0322fbde3ae4f8b78a60aafac4d7f2aee",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-12-19T16:17:45Z",
    "title_canon_sha256": "10f4b050dc0dbfae61ec4bf05bd1533321bac16a0381c91e9ab878b6d085be8f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9712278",
    "kind": "arxiv",
    "version": 1
  }
}